Lesson 13 of 20
Connect three tables without multiplying rows
Follow the level of detail of an analysis across orders, order lines and products.
35 minSQL Essentials
By the end of this lesson
- Chain several joins
- Predict cardinality
- Aggregate at the right level after join
SQL Essentials
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Connect three tables without multiplying rows is part of the complete programme: 20 lessons, 44 verifiable exercises and 2 published guided projects.
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